void setup()
{
  volatile char *dirf,*outf;
  volatile char *dirk,*ink;
  dirf=0x30; outf=0x31;
  dirk=0x107; ink=0x106;
  *dirf=0xFF; *ink=0x00;
  volatile char switches;
  volatile long arr[]={63,6,91,79,102,109,125,7,127,111};
  volatile long i,j,k,stopbit=1;
 loop: while(1)
  {
    if(stopbit==0)
    {
    *outf=0;// off the display
    break;
    }
      *outf=arr[9];
      switches=*ink;
      if((switches & 1) == 1)
      {
        j=9;
        while(j>=0)
        {
          while(1)
          {
            switches=*ink;
            if((switches & 2) == 2)
            {
              stopbit=0;
              goto loop;
            }
            else
            break;
          }
          *outf=arr[j];
          for(k=0;k<=200000;k++);//delay
          if(j==0)
          {
            j=9;
            continue;
          }
          j--;
        }
      }
  }
}

void loop()
{

}